Patents by Inventor Kenji ISHI

Kenji ISHI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8706016
    Abstract: An elastic layer is provided on a surface of one of a metal core and a substrate. A fixing member and a pressure member press into each other and collectively create a nip therebetween. A toner image is conveyed and fixed when passing through the nip. A thickness of the elastic layer is different in at least two widthwise regions by the same amount from the other region. A pair of edges of a prescribed size of the transfer sheet pass through these two widthwise regions, respectively.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: April 22, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Takahiro Imada, Masanao Ehara, Tadashi Ogawa, Satoshi Ueno, Hiroshi Seo, Takamasa Hase, Kenji Ishi
  • Patent number: 8421422
    Abstract: A power supply device comprising: a magneto generator including a rotor including a magnet forming a magnetic field; a rectifying unit rectifying an alternating current of the generator to a direct current and supplying to an electrical load; a voltage detection unit detecting a voltage of the electrical load; an opening unit interrupting electrical conduction of an output of the generator; short-circuiting units electrically short-circuiting the output; a torque supplying device supplying torque to the rotor; a voltage control unit selectively performing one of opening-control of controlling on/off switching of the opening unit and short-circuit-control of controlling on/off switching of the short-circuiting units to control the voltage of the electrical load to a predetermined value in accordance with the voltage detected by the voltage detection unit; a switching control unit switching and controlling between the above two controls in accordance with an operating state regarding rotation of the rotor.
    Type: Grant
    Filed: May 6, 2010
    Date of Patent: April 16, 2013
    Assignee: Mitsubishi Eletric Corporation
    Inventors: Naoki Itoi, Masayoshi Maeda, Nobuhiro Kihara, Kenji Ishi, Hiroshi Okuda, Fumito Uemura
  • Patent number: 8415930
    Abstract: Provided is a power supply device including: a magneto generator (1), which includes: a rotor including a magnet forming a magnetic field; and a stator which generates an alternating current in stator windings by rotation of the rotor; a rectifying unit (3) which rectifies the alternating current generated by the magneto generator to a direct current; a variable transformation-ratio direct current voltage transformer (40) which transforms an output voltage of the direct current of the rectifying unit to a voltage between input terminals of an electrical load (2) to which electric power is supplied; and a voltage control unit (5) which controls a transformation ratio of the variable transformation-ratio direct current voltage transformer in accordance with at least one of an operating state signal regarding the rotation of the rotor of the magneto generator and an electrical load state signal of the electrical load.
    Type: Grant
    Filed: May 3, 2010
    Date of Patent: April 9, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Nobuhiro Kihara, Masayoshi Maeda, Shinji Kawaguchi, Hiroshi Okuda, Fumito Uemura, Takahiro Urakabe, Masaya Inoue, Naoki Itoi, Kenji Ishi
  • Publication number: 20110101930
    Abstract: A power supply device comprising: a magneto generator including a rotor including a magnet forming a magnetic field; a rectifying unit rectifying an alternating current of the generator to a direct current and supplying to an electrical load; a voltage detection unit detecting a voltage of the electrical load; an opening unit interrupting electrical conduction of an output of the generator; short-circuiting units electrically short-circuiting the output; a torque supplying device supplying torque to the rotor; a voltage control unit selectively performing one of opening-control of controlling on/off switching of the opening unit and short-circuit-control of controlling on/off switching of the short-circuiting units to control the voltage of the electrical load to a predetermined value in accordance with the voltage detected by the voltage detection unit; a switching control unit switching and controlling between the above two controls in accordance with an operating state regarding rotation of the rotor.
    Type: Application
    Filed: May 6, 2010
    Publication date: May 5, 2011
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Naoki ITOI, Masayoshi MAEDA, Nobuhiro KIHARA, Kenji ISHI, Hiroshi OKUDA, Fumito UEMURA
  • Publication number: 20110064502
    Abstract: A fixing system includes a fixing device that fixes a non-fixed image with heat onto a recording medium. The fixing device includes a fixing roller that generates heat and a pressing roller that presses against the fixing roller. A curl correction device is provided to correct curling of the recording medium passing through the fixing device. The curl correction device includes a heating roller unit that generates heat and an elastic roller that presses against the heating roller unit. A magnetic flux generating device is arranged in the vicinity of the fixing device and the curl correction device and generates magnetic flux.
    Type: Application
    Filed: September 14, 2010
    Publication date: March 17, 2011
    Inventors: Takamasa HASE, Masanao EHARA, Kenji ISHI, Tadashi OGAWA, Satoshi UENO, Hiroshi SEO, Takahiro IMADA
  • Publication number: 20110064490
    Abstract: An elastic layer is provided on a surface of one of a metal core and a substrate. A fixing member and a pressure member press into each other and collectively create a nip therebetween. A toner image is conveyed and fixed when passing through the nip. A thickness of the elastic layer is different in at least two widthwise regions by the same amount from the other region. A pair of edges of a prescribed size of the transfer sheet pass through these two widthwise regions, respectively.
    Type: Application
    Filed: September 13, 2010
    Publication date: March 17, 2011
    Applicant: Ricoh Company, Ltd.
    Inventors: Takahiro Imada, Masanao Ehara, Tadashi Ogawa, Satoshi Ueno, Hiroshi Seo, Takamasa Hase, Kenji Ishi
  • Publication number: 20100289459
    Abstract: Provided is a power supply device including: a magneto generator (1), which includes: a rotor including a magnet forming a magnetic field; and a stator which generates an alternating current in stator windings by rotation of the rotor; a rectifying unit (3) which rectifies the alternating current generated by the magneto generator to a direct current; a variable transformation-ratio direct current voltage transformer (40) which transforms an output voltage of the direct current of the rectifying unit to a voltage between input terminals of an electrical load (2) to which electric power is supplied; and a voltage control unit (5) which controls a transformation ratio of the variable transformation-ratio direct current voltage transformer in accordance with at least one of an operating state signal regarding the rotation of the rotor of the magneto generator and an electrical load state signal of the electrical load.
    Type: Application
    Filed: May 3, 2010
    Publication date: November 18, 2010
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Nobuhiro KIHARA, Masayoshi MAEDA, Shinji KAWAGUCHI, Hiroshi OKUDA, Fumito UEMURA, Takahiro URAKABE, Masaya INOUE, Naoki ITOI, Kenji ISHI